Green House Seed Co.

Green House Seed Co. was co-founded in Amsterdam in 1994 by Arjan Roskam and Scott Blakey, and also runs coffeeshops in the city. Super Silver Haze became the first strain to win back-to-back Cannabis Cups in 1998 and 1999, and Super Lemon Haze won again in 2008 and 2009.